Add test for Sophia + ComponentArrays + Enzyme shadow generation fix

This test verifies that the Sophia optimizer works correctly with
ComponentArrays and Enzyme autodiff without encountering the shadow
generation MethodError that was previously occurring.

The test uses the existing minibatch test setup with ComponentArrays
and creates an AutoEnzyme optimization function to ensure the fix
works in the specific combination that was failing.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: ChrisRackauckas

test/minibatch.jl

@@ -71,6 +71,15 @@ res1 = Optimization.solve(optprob, Optimisers.Adam(0.05),
     callback = callback, maxiters = numEpochs)
 @test 10res1.objective < l1
 
+# Test Sophia with ComponentArrays + Enzyme (shadow generation fix)
+optfun_enzyme = OptimizationFunction(loss_adjoint, Optimization.AutoEnzyme())
+optprob_enzyme = OptimizationProblem(optfun_enzyme, pp, train_loader)
+
+res_sophia_enzyme = Optimization.solve(optprob_enzyme,
+    Optimization.Sophia(η=0.01, k=5), callback = callback,
+    maxiters = 50)
+@test res_sophia_enzyme.objective < Inf  # Test that it runs without MethodError
+
 optfun = OptimizationFunction(
     (θ, p) -> loss_adjoint(θ, batch,
         time_batch),